A look inside the Varta 15 minute 8A NiMH fast charger. A teardown and look at how it works and the circuit topology. Can Sanyo Eneloops be charged this fast too? Part 2: https://www.youtube.com/watch?v=OgsWOHdDn2w Forum: http://www.eevblog.com/forum/blog/eevblog-811-how-the-varta-15-minute-battery-charger-works/ Datasheets: http://litel.com.pl/karty-produktow/Varta-AA-2100mah-56706-datasheet.pdf http://www.din-tek.jp/Upload/Product%20Doc/Datasheet/DTM4410.pdf http://www.ti.com/lit/ds/symlink/tl494.pdf ... https://www.youtube.com/watch?v=PxZ7M1hZqXk

A follow up to the previous video on repairing the heater. A viewer asked how the capacitor diode rectifier gave a 24V output. The key is in the zener regulator, so this vidoe looks at how mains powered zener voltage regulators work, and their limitations. X class capacitor and self healing. Zener diode tutorial video: https://www.youtube.com/watch?v=O0ifJ4oVdG4 Forum: https://www.eevblog.com/forum/blog/eevblog-1482-mains-capacitor-zener-regulator-circuit/ Support the EEVblog on: Patreon: http://www.patreon.com/eevblog Odysee: https://odysee.com/@eevblog:7 Web Site: http://www.eevblog.com EEVblog2: http://www.youtube.com/EEVblog2 EEVdiscover: https://www.youtube.com/eevdiscover AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog #ElectronicsCreators #Tutorial #Zener ... https://www.youtube.com/watch?v=vJ4pW6LKJWU

Teardown and calibration checking of a Keithley 480 Picoammeter Dave got from ebay. This was supposed to be a repair and troubleshooting as well, but Murphy had other ideas. Keithley 480 User & Service Manual: http://www.ko4bb.com/Manuals/09)_Misc_Test_Equipment/Keithley/Keithley_Model_480_Picoammeter_Complete.pdf Forum Topic: http://www.eevblog.com/forum/blog/eevblog-406-keithley-480-picoammeter-teardown-calibration/ EEVblog Main Web Site: http://www.eevblog.com EEVblog Amazon Store: ... https://www.youtube.com/watch?v=zDcl0-t7ceY

Part 2 of the HP 35670A Dynamic Signal Analyser repair. Part 1: http://www.youtube.com/watch?v=YwiZROj3SSI Part 3: http://www.youtube.com/watch?v=orYJFKQDZLo Forum: http://www.eevblog.com/forum/blog/eevblog-538-hp35670a-dsa-repair-part-2/ EEVblog Main Web Site: http://www.eevblog.com EEVblog Amazon Store: http://astore.amazon.com/eevblogstore-20 ... https://www.youtube.com/watch?v=7dd_A28gtzY